Brush mounting



1. n. Nuss. I BRUSH MOUNTING.

APPLICATION FILED APILZT, 1921.

1,428,342g Patented sept. 5; 1922.

, RMMNNM Patented Sept. 5, 1922.

UNITED, STATES PATENT oFFics.

sito

J'Oltllll' l). NIE,

BLESS, ILLINIS, ASSIGNE TU KIlllIBLE ELECTRIC COMPLIIY, 0F CHICAGO, ILLINOIS, A CORPORATION Ol? ILLINOIS.

BRUSH MOUNTING.

Application rusa .Api-i1 27, 1921. serinno. 464,844.

To all whom t may concern.' f

Be it known that I, JOHN l). Nins, a citizen of the 'United States, residing at St. Charles, in the county oit Kane and State ot Illinois, have invented vcertain new and use ful Improvements ina Brush Mounting, ot which the following is 4a specification.

This invention pertains iny general to electrical devices, and more speciiically has to dowith a novel mounting 'for currentcon` lducting brushes.

The inainrand primary objects ot the invention, broadly statechare the provision ot an improved brush mounting wherein the brush, its holder and itsregulator are carried on a unitary supporting blocltoic insulating material; wherein the said regulator, although in contact with the brush, isr

insulated at all other points, thus ypreventin g any leakage ot current through the same and consequent arc-pitting ot its relatively moving parts; wherein the cable attaching means eiliciently serve both to hold the wire ends securely and to prevent the insulating fabric covering of the cable from being drawn back Iaway from said `ends, and wherein the construction ot the mounting enables thesarne to be Ahtted to motor Ytrames ot various sizes, wherebythe necessity and expense ot making a `ditlferent`supporting bloeit for each size oi trame is obviatcd.

.fflnother important object ot the invention the provision in such a mounting oi" a brush regulator which is adapted to exert a substantially constant pressure on the brush regardless ot the changing position there-ot and whichis cooperatively associated with the supporting block in such a manner as to permit ready adjustment or the pressure ap plied to the brush thereby.

@ther objects and advantages oit the pref*-` ont invention will become apparent as the nature ol" the same is better understood from the following description and accompanying L drawing wherein one embodiment of the in ventionis set `forth tor the purpose ot enem- `].)lihcation. The invention is obviously sus-y ceptible et embodiment in forms which dit# ferin unessential detailsl from that here illustrated and described, and it should Fig. l is a front elevation of thebrush mounting of this invention;

is a sectionon the line 2 2 ot Fig. l, illustrating among otherthings the `manner of attachment ot the blockv to the block carrying the same;

Fig. 5 is a vfragmentary front elevation or" the mounting, showing in section the brush, brusheholder and pin on which the regulator` is carried; v

Fig. 6 is a rear elevation ot the mounting,` illustrating primarily the4 cable attaching means and the block construction whereby attachment to various sizes ott 'trames4 is made possible; y

Fig. 7 is a detail view oi the regulator cap which adjustably anchors the' regulator spring to the block; and 'y Fig. S is a section on the line 8-8 ot Having reference to the drawing, and more particularly to Figs. 1,13 and G thereof, the numeral l0 designates a block which is molded, or otherwise formed, of insulating material. This `block is composed ot a` slightly arcuate portion 1l, and a cylindrical portion disposed, as shown, at one end of said arcuate portion. A positioning` toI iange 13 is formed onthe under side ot the f arcuate portion near the trent tace thereof and serves` to abut against the endot a motor trame lll` towhich the block is irredly attached by means ot a machine screw 15. This screw passes through 'the block and engages within a threaded radial aperture formed in rthe periphery oi' the iframe la. The `previously mentioned flange 13 ot the block prevents the same trom turning about the airis of the screw, and thereby permits a rigid attachment to the trame by vmeans of the one screw. The under supporting surtace 1G of the block, shown in Figs. Q and 6,fis concavely formed on Van are' ot smaller radius than the radius ot curvature ot any motor trame to which this mounting i i is intended to be attached, and will theretore offer a irm support by actually bearing upon lthe periphery of the motor 'trame at the ends 1'? ,nly ot `said under surface.y

The brush 18 is preferably ofthe ordinary carbon block type,` and is slidably carried iio in an open ended holder 19 oi: rectangular cross-section. This holder prorided with a ilanged base portion 2l) which is into the insulator' block 11 with its outer lf'ace Hush with the suriiiure thereof. i-iligned notches 21 are cut in opposite sides ol3 the holder to expose laterally a sn'ialler and nlore shallow notch 22 which is disposed in the brush intermediate said notches 2l olE the holder. These notches are provided 'tor the purpose of giving` the brush regulatorj which will be described hereinafter in detail, operative access to the brush regardl of the gradual advancement el the lat towards the coininutator (not shown) with which it is cooperatively associated` Bi. plate 23 is set into the bloclr 11 on that side oit the saine opposite the holder 19. Machine screws 2st pass through aligned a pertures in the plate and block and engage in threaded apertures inthe flanged portion 2O o'lI the brushholder7 whereby the plate and. holder are lixcdly secured to the bloclvv and an electrical connection 'iiorn'ied between the saine through said screws. Current eonducting' cables 25 enter grooves 26 in the suriace of the block adjacent the plate, and passing under the edges oli the plate are attached to the saine at a inedial point thereolf. Tn order to attach the wires 27 el the cables to the plate a small ear 28 is out in the sinne and bent inwardly. The wire ends are then overlapped on this ear, and the ear pressed outwardly again a suliicient distance to bind the wire ends against dis placement. It desired a little solder 2&3 may then be fused onto the exposed wires to lill the wedge shaped rectangsgular depres sion le'lit in the plate and to insure perfect current conduction. The portions olE 'the plate 23 overlapping the fabric covered insulation 29 ol 'the wires 27 adjacent their inner bare ends press inwardly on the cibles at these points and prevent withdrawal or irayingoll the fabric and insulation ends. It will be evident, oll course, that one cable may be attached to the plate 23 in the saine manner as described 'lor two.

A direct positive connection is Yformed beA tween the plate 23 and. brush 18 by ineans oit a l'lexible shunt wire 30 which is attached` at one end to the plate by means of an ordinary terminal connecting ringl clamped against the same by either oit the machine screws 24, and at the other end to the brush by being imbedded in the carbon thereof.`

The brush regulator of' this .invention is carried by the cylindrical portion 12 ol the mounting 1 0. One end o'l' this portion projects forwardly beyond the face ot the block to which the brush holder is attached, and

terminates just short olI a point opposite the notches 21 in the sides of' said holder. The cylindrical portion 12 is provided with an axial aperture extending therethrough7 and has its forward end lace provided with a plurality oli pairs olE oinviositely disposed radial kerlis 3l, as shown in Fig. A cap 232 seats over this slotted end and is provided with two oppositely disposed tongues 3B which are adapted to lit into any pair oil the kcr'lis 3l and thereby prevent rotation ot the cap relative to the axis o'l the cylindrical portion olf the mounting. This cap, which best shown in Figs. Ll; and. i', is iliorined on the side thereolf opposite the tongues 33 into an axial sleeve portion 34 which slit longitudinally along` one side and there bent tangentially into a lip The spring 36 oil.i the regulator is ot the combined leat and helical type, being cornposed of a helical coil 37 disposed on the surface ot' the cap 32 about the sleeve portion Se and a leaf portion 38 bent normally outward at tlie outer end olf the coil. The inner end oit the spring is toi-ined into a small hook 39 and engages the lip olf the sleeve portion ol vthe c: p9 while thc outer end olE the sin'iuoj bears against the bottoni ol' the notch 2") in the brush. A circulaihousin A.Ll-(l loosely encompasses the coil oli the springv 3G on the cap 32 andA proviihzrl one side with an aperture through which the lcaif portion of the spring passes out wardly.

A longI axial pin `l-'l passes through a cen tral aperture in t-he end el.t the springr housing? through the sleeve portion oli the cap and through the arial aperture in the cvlin drical portion ot the mounting. That end ot the pin projectingv exteriorly ot the spring housing is provided with a transverse cotter ilo to abut against said he sing, while the opposite end ot the pin projects troni the other extremity or the cylindrical portion .12 and is there in'ovided with a coaxial spial spring t3 compressed between two washers elfithe outer ol.E which abuts against a transverse cotter on the pin. This construction serves to maintain the spring housing agniircst the cap7 and the latter against the cylindrical portion l2 ci? the mount-ilu: `wl'u-a'eby the spring` it is anchored in a lined position relative to the mountingl ll). .ll it is desired to vary the pressure eizcrterl by the sin'ingc;` 3G ou the brush it is merely .necessary to gras p the pcriijihery o'l'thc ca p, which is lrnurled :tor this inn-pose7 draw the saine away trein the portion 12 until the tong'ifies 33 are rtree oit the kerits zll, turn the cap in either direction the desired aniountf and then release the saine and permit theA tongues to enter the lverts with which they are in nearest approximate alignment. Turning the cap in counter-clocliwise direction will increase the tension ot sprino 3G. while turning in the opposite direction will decrease the tension. This completes the description el.2 the brush mounting.

Tt will be noted that the mounting here disclosed is formed as a single insulator block on which the brush holder and brush regulator are both supported. Thisobviatcs the necessity of employing insulating sleeves and plates at various points such as are required in the ordinary typemetal mounting. Furthermore the regulator spring is insulated ait-its support, and destructive arcpitting of the spring and its contiguous current-conducting parts is `therefore prevented.

The regulator spring 36, because of its combined helical and leaf construction, leX- erts a' substantially constant pressure on the brush as the latterl Wears aivay,ratlier than the gradually weakening pressure characteristic of ordinary leaf springs when used in this connection.

I claim:

1. In a brush mounting, block, a brush, and a brush regulator acting on the brush to move the same in a straight line, the surfacesof contact between said block and regulator being shaped to permit of selective engagement of one with the other in a number of angular positions.

2. In `a brush mounting, a supporting block, a brush, and a brush regulator bearing directly on one end of the brush, the surfaces of contact between said block and regulator being shaped to permit of selective engagement of one Awith the other in a number of distinct angular positions.

3. In a brush mounting, a supporting block, a brush holder rigidly secured to the block, a brush mounted for reciprocal movement in the holder, a brush regulator comprising a spring adapted to exert pressure on the brush,and adjustable means for connecting the spring to the block.

4. In a brush mounting, a supporting block of insulating material, a brush holder carried by the block, a brush, a brush regu-.

lator carried by the block and acting on the brush, means consisting of cooperating portions of the regulator and block for adjusting the pressure exerted by the. regulator on `the brush, and means for connecting the brush 'with a current-conducting lead.

5. In a brush mounting, a supporting block, adapted to carry a brush and brush lioldcrand having a concave attaching surface on its under sideinorder to bear at the ends only of such surface upon the convex surface of the object to which attached.

6. In a brush mounting, a supporting block of insulating material adapted to carry a brush, a brush holder and brush regulator, said block having a concave attaching surface on its underside and a contiguous flange at right angles to said surface and along the n adjacent face of the flange in order to bear at the ends only of such surface upon the` convex surface and end face respectively of the object to which attached, whereby rocking movement of the block in a vertical or horizontal plane is precluded.

7. In a brush mounting, a supporting block, a brush holder carried by said block, a. brush, amember in current-conducting connection With the brush, and means for attaching the current-conducting member to a cable Whereby'to effect indirectly through said member a current conducting connection ofy the brush with the cable, said member serving to hold theinsulating cover of theycable against Withdrawal.

J8. In a brush mounting, a supporting block, a brush holder carried by said block, a brush, a member in current-conducting connection Withthe brush, and means for attaching the current-conducting member to a cable, said member serving to rclamp the' inj sulating coverof the cable against the block a supporting to prevent Withdrawal. i '9. In `a brush mounting, a supporting block having a groove thereima brush holder carried by saidA block, a brush,'a member located on saidfblock and partially covering said groove, a current-conducting connection of said member with the brush, a cable occupying said groove, and means for attaching said cable to the member on the under side thereof, said member serving to hold the insulating cover of thecable against Withdrawal.

10. In a brush mounting, 'ab supporting block, a brush holder carried by the bloclna brush, a brush regulator comprising a spring adapted to' bear 'directly against the brush, and adjustable means for connecting the spring to the block. t 11. In a brushmounting, a supporting block, a brush holder carried by the block, a i brush adapted in operation to move `freely in the holder, a brush regulator carried by the block and comprising aA spring adapted to exert pressure on the brush, and adjustable means for connecting the spring to the block. l2. Ina brush mounting, a. supporting block, a brush holder carried by the block, a brush, a brush regulator carried by the block and comprising a spring adapted to exert pressure Aon the brush, and adji'lstable means for connecting the spring to the block, said spring being straight adjacent said l*brush i and helical adjacent said connecting means in order to' exert a substantially constant pressure on the brushas it recedes thereunder.

13. In a brush lmounting, a supporting block of insulating material, a vbrush holder carried'by the block, a brush, a brush regu-` lator comprising a spring adapted to eXert pressure on the brush, and adjustable means for connecting the spring to the block.

14:. In a brush mounting, a supporting block of insulating material, a brush holder carried by the block, a brush, a brush regulator carried by the block and comprising a spring adapted to exert pressure on the brush, and adjustable means tor connecting the .spring` toy the block, said spring being helical adjacent said connecting means in order to exert a substantially constant pressure on the brush as itrecedes thereunder.

l5. lln algirush mounting, a brush supporting block adapted `for attachment to divers siaes ot electrical. machines, said bloei;` having a concave attaching 'face arranged tto bear at its extremities only upon the opposed surface of the machine.

16.111 a brush mounting, a supporting block, and a brush regula-tor, one of said elements being provided with a plurality of recesses and the other with a projection adapt.- ed to enga-ge selectivelyv in any one of said recesses, whereby to etleet and maintain angular adjustment between said elements.

17. In a brush mounting, a supporting block, and a brush regula-tor pivotally attached thereto, one of said elements being provided with a plurality et recesses and the other with a projection adapted toengage selectively in any one oil? said recesses, whereby to etl'ect and maintain angular adjustment between said elements.

1.8. ln a brush mounting, a supporting block, a brush regulator pivotally attached thereto, one ol' said elements being provided with af plurality oi recesses and theo-ther with a projection adapted to engage selectively in any one of said recesses, whereby to ellect and maintain angular adjustment between said elements, and yielding means seiiving to hold said projection in` inter-engagement with one of said recesses.

19.111 a brush mounting, a supporting block having a bore therein anda recessed tace at one extremity of said bore, a brush regulator having a bore therein and a projection adjacent one extremity of said bore adapted to engage selectively in any one olf said recesses, a coupling member passing through said bores, and yielding means associated with said member and Serving to hold saidA projection in inter-engagement with any one oli said recesses.

2U. ln a brush mounting, a supporting block, and a brush regulator, one oit' said elements being provide/(1l with a plurality of recesses and the other with a plurality of .proj ectionsadapted to engage selectively in certain ol said recesses, whereby to effect and maintain angular adjustment between said elements.

Q1... ln a brush mounting,l a supporting block, and a brush regulator pivotally attached thereto, one of said element-sl being provided with a plurality et recesses and the other with a plurality oi jn'ojcctions adapted to engage .selectively in certain ol. said recesses, whereby to etlect and maintain angular adjustment between said elements.

Q9. ln a brush mounting, a supporting blocl; having a bore therein and a recessed :tace at one extremity olisaid bore, a brush regulator having` a bore therein and a plurality olf projections adjacent one extremity ot said bore adapted to engage selectively in certain ol.I said recesses, a, coupling member passing through said bores, and yielding means associated with said .member and serving to hold said jnojections in `interengagement with certain olf said recesses.

23. In a brush mounting, a` supper-tir block or insulating material carrying a brush holder and brush, a brush regulator mounted on the block, and recesses in thc bloclr adjacent the attachment ot the regulator iter coafction therewith, whereby :nljustment oli the latter can be el'l'ected.

2l. ln a brush mounting, a supporting bloei; ot insulatingmaterial carryinga brush holder and brush, a. brush ref gulator mounted on the bloc-liz, and mefuis on the block adjacent the attachment oli thc regulator `tor co-action therewith, whereby adjustment oli the latter can be effected.

25. In a brush mounting, a supporting block oil. insulating material. carrying a brush holder and brush, a brush regulator :l'or the brush nioiuited on the bloei-, and a shaping oit the blochr adjacent the attachment et the regulator vtor co-action therewith, whereby adjustment ol: the latter can be el'l'ected.

In a brush. mounting, a brush supporting block having a concave attaching tace adapted to bear at its' extremities upon an opposed. surface oit the sujjiporting tarmo, and means engageable with the block intermediate its extremities lier .securing thesame to the trame. i

27'. lfn a brush mounting, a brush snjiporting block having a concme attaching tane udapteiil to bear at its mitremities upon an opposed snr-tace ot the supporting lrurne, and a pin secured to the Frame and engageable with the hlm-fhr at a central point thereof lor holding the block tothe trame.

lin witness whereo't l have hereunto signed my name in the jnfesi-uice ot two subscribing witnesses.

JOHN D. NIES.

lllitnesses RAYMOND L. Gnnrs'r, Rose (l. PnnLMU'rnn. 

